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| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2016-12-12 16:45:35 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-12 18:55:09 -0800 |
| commit | 4ca5ede07c9871c13ae422c96d6d08dbd0df5eda (patch) | |
| tree | 71b67a4356f091441bd67074ac41398b50cb323e /kernel/hung_task.c | |
| parent | 1270dd8d994039b677d0504ba7260873d608bf75 (diff) | |
| download | lwn-4ca5ede07c9871c13ae422c96d6d08dbd0df5eda.tar.gz lwn-4ca5ede07c9871c13ae422c96d6d08dbd0df5eda.zip | |
hung_task: decrement sysctl_hung_task_warnings only if it is positive
Since sysctl_hung_task_warnings == -1 is allowed (infinite warnings),
commit 48a6d64edadb ("hung_task: allow hung_task_panic when
hung_task_warnings is 0") should decrement it only when it is not -1.
This prevents the kernel from ceasing warnings after the first
4294967295 ;)
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: John Siddle <jsiddle@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/hung_task.c')
| -rw-r--r-- | kernel/hung_task.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/hung_task.c b/kernel/hung_task.c index 2b59c82cc3e1..40c07e4fa116 100644 --- a/kernel/hung_task.c +++ b/kernel/hung_task.c @@ -106,7 +106,8 @@ static void check_hung_task(struct task_struct *t, unsigned long timeout) * complain: */ if (sysctl_hung_task_warnings) { - sysctl_hung_task_warnings--; + if (sysctl_hung_task_warnings > 0) + sysctl_hung_task_warnings--; pr_err("INFO: task %s:%d blocked for more than %ld seconds.\n", t->comm, t->pid, timeout); pr_err(" %s %s %.*s\n", |